Improved machine for making tin-lined lead pipe



PATENTED JUNE 1, 1869.

Y J. ROBERTSON. MACHINE FOR MAKING TIN LINED LEAD PIPE.

UNITED STATES PATENT OFFICE.

Joan tonnn'rson, or BROOKLYN, new YORK.

Specification forming part of Lettcrs Patent No. 90,872, dated June 1, 1869.

1'0 all whom it may concern: f

Be it known that I, JOHN ROBERTSON, of Brooklyn, in the county of Kings and State of New York, have inventeda new and useful Improvement in the lllanufacture of Lead-Incased Tin Pipe, of which the t'ollowingis a full,

clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, and in which- Figure 1 represents a vertical section of a press or apparatus-for making load-incased block-tin pipe constructed in accordance with my improvement; Fig. 2, a horizontal section taken immediatelyhelow the head of the press, and showing a plan of a swinging lead-ram attached thereto; Fig. 3,-aninvcrted plan of the head portion of the press,in illustration of the knife secured thereto; and Fig. 4, a sectional view, on a larger scale, of the lower portion of the lead-ram, with a made pipe or remaining portion of a made pipe arranged therein after saidra-m'has been slid or swung to one side of the lead-cylinder.

Similar letters of reference indicate corresponding parts.

My improvement has reference to the manufacture of lead-incased block-tin pipe by the combined action of a leadcylinder containing the lead, and tin ingots or castings within it, a steel or other like core arranged to occupy an axial relationship to the cylinder, and adie or dies, through which the combined metals are forced, and that gage and give shape to the exterior of the pipe, while the core forms and gages the interior of it, the tin ingot, through which the core passes, being surrounded or incased by the lead ingot, and the necessary power to force out said metals through the die or dies being effected by bydraulic pressure or action.

In this connection the invention consists in a peculiar construction of the base of theleadram, whereby the sing or remnant of the lead ingot is retained or held byit. and the friction of the pipein the lead-ram, so that said slug may be afterward cut or removed from the pipe or after portion of it, instead of being retained in the cylinder to be worked up with a succeeding ingot, which latter utilization of the sing or remnant makes imperfect pipe; secondly, the invention consists in the combination of a knife in the head of the press and a cutter in the top of the swinging or slidfuse any portion of them.

inglead-ram, for cutting the pipe, by or'throngh the lateral action of the ram,'for the purpose of facilitating such adjustment of the latter.

Referring to the accompanying drawings,

A represents the water-ram, andB the water- ,cylinder, of the press, into whichwater is supplied or forced through a pipe, or, at its base by pump or otherwise. This ram serves to carry on its top, by or through suitable connections, the lead cylinder 0 and core D, the latter-being centered and held within the cylinder G by lower setscrews, b b, and being changed, it necessary, bya different core when a diflerent-sized pipe is required. The upper end of this core D is represented as lying flush with the top of the lead cylinder, which the lead-ram E, carrying a die, 0, at its base, is just arranged to clear, thus at the commencement of the work bringing the top of the core and bottom of the die or dies flush, or nearly so. Said die is held to its place by a set screw or screws, so that when the lead-ram is swung or slid to one side, as hereinafter described, it may be changed for a die of difierent size, if required, such swinging or sliding of the leadram also facilitating thechangingof the core, besides possessing other advantages, which will be hereinafter explained.

The tin or tin ingot (2 may either be cast alone or run into the lead ingot e, and said castings, when prepared readyl'or putting into the cylinder, as represented in Fig. 1, may be kept till required to be made into pipe in an oven of a proper temperature, but not so as to The lead-cylinder C may also be kept at a given temperature by any known means for keeping the ingots at a uniform heat in working them into pipe. The pipe G, as it is made by the ascent of the leadcylinder and its core, acting in concert with the stationary lead-ram and its die or dies, is forced or delivered up through the hollow of the ram and out' through a hole,f, in the head H of the press. r k

It is an important feature in this arrangementthat while the lead-cylinder audits core travel, the lead-ram E with its die or dies rcinains stationary, and that said ram has a firm bearing against or under the head H of the press.

To economize time and labor'in working under such an arrangement of parts or devices, I attach said ram to the head H of the press into said cylinder without backing the full .be dropped to their place in the lead-cylinder -fully moved to one side the pipe previously low of the ram being freely slid or swung lat- H a knife, k, and providing the top of thelcadin such manneras that it may he slid or swung out horizon tally.- Thus said ram may be formed or provided with a top plate, g, pivoted, as at h, to the head of the press, and suitably supported on a track or way,-

so that it may be swung to one side, out of line with the leadcylinder 0, as shown by red lines in Fig; 2, and whereby the castings or ingots may be put length of them, or otherwise lowering the water-ram a greater distance than is necessary for the lead-rain to clear the top of it. As the core always remains 'stationaryin thelead-cylinder the ingots or castings may very readily when the lead-ram is slid or swnngtoone side, as described. Before, however, said ram is made in it may be clipped or cut at a point or on a level a little below the head of such ram or upper surface of the plate on its top, to alerally. This I effect by arranging in the head or remnant of the casting therein is forced or pressed into said cavity and there retained, the frictional hold or fit of the pipe or portion of it in the lead-ram aidin g to effect such retellof the slug or remnant of o'ne-charge in the lead-cylinder to be worked up in connection with a succeeding charge invariably produces a long defective portion in the pipe.

This modeof producinglead-incased tin pipe is superior to making it with a long core-holder, which has to be drawn the full length of the cylinder away from the ram before the castings can be put into the cylinder, and then the core require to be pushed back through the casting to its original position relatively to the ram.

What is here claimed as new,and desired to be secured. by Letters Patent, is-

l. The im proved lateral] y-swin gin g die-holding ram E, having acountersink or cavity, m, as and for the purpose specified.

2. The arrangement of the swinging leadrainlu, knives k l, and stationary frame H,r ip.e.,

the manner shown and described.

JOHN ROBERTSON.

' Witnesses:

FRED. HAYNES, HENRY PALMER. 

